package com.xxxx.seckill.controller;

import com.xxxx.seckill.config.AccessLimit;
import com.xxxx.seckill.pojo.User;
import com.xxxx.seckill.service.IGoodsService;
import com.xxxx.seckill.service.IUserService;
import com.xxxx.seckill.vo.GoodsVo;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import org.thymeleaf.context.WebContext;
import org.thymeleaf.spring5.view.ThymeleafViewResolver;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Date;
import java.util.concurrent.TimeUnit;

@Slf4j
@Controller
@RequestMapping("/goods")
public class GoodsController {
    @Autowired
    private IUserService userService;
    @Autowired
    private RedisTemplate redisTemplate;
    @Autowired
    private IGoodsService goodsService;
    @Autowired
    private ThymeleafViewResolver thymeleafViewResolver;


    /**
     * 跳转至商品详情
     * 优化后 动静分离过的
     *
     * @return
     */
    @RequestMapping(value = "/goodsDetail2/{goodsId}", produces = "text/html;charset=utf-8", method = RequestMethod.GET)
    @ResponseBody
    public String toDetail2(Model model, User user, @PathVariable Long goodsId, HttpServletRequest request, HttpServletResponse response) {
        ValueOperations valueOperations = redisTemplate.opsForValue();
        String html = (String) valueOperations.get("goodsDetail:" + goodsId);
        if (!StringUtils.isEmpty(html)) {
            return html;
        }

        model.addAttribute("user", user);
        GoodsVo goodsVo = goodsService.findGoodsVoByGoodsId(goodsId);
        Date startDate = goodsVo.getStartDate();
        Date endDate = goodsVo.getEndDate();
        Date nowDate = new Date();
        //秒杀状态
        int seckillStatus = 0;
        //秒杀倒计时
        int remainSeconds = 0;

        if (nowDate.before(startDate)) {
            //秒杀还未开始0
            remainSeconds = (int) ((startDate.getTime() - nowDate.getTime()) / 1000);
        } else if (nowDate.after(endDate)) {
            //秒杀已经结束
            seckillStatus = 2;
            remainSeconds = -1;
        } else {
            //秒杀进行中
            seckillStatus = 1;
            remainSeconds = 0;
        }
        model.addAttribute("remainSeconds", remainSeconds);
        model.addAttribute("goods", goodsVo);
        model.addAttribute("seckillStatus", seckillStatus);

        WebContext webContext = new WebContext(request, response, request.getServletContext(), request.getLocale(), model.asMap());
        html = thymeleafViewResolver.getTemplateEngine().process("goodsDetail", webContext);
        if (!StringUtils.isEmpty(html)) {
            valueOperations.set("goodsDetail:" + goodsId, html, 60, TimeUnit.SECONDS);
        }

        return html;
    }

    /**
     * 跳转到商品列表页
     * 动静分离
     *
     * @return
     */
    @RequestMapping(value = "toList", produces = "text/html;charset=utf-8", method = RequestMethod.GET)
    public String toList(User user, Model model, HttpServletRequest request, HttpServletResponse response) {
        ValueOperations valueOperations = redisTemplate.opsForValue();
        String html = (String) valueOperations.get("goodsList");
        if (!StringUtils.isEmpty(html)) {
            return html;
        }

        model.addAttribute("user", user);
        model.addAttribute("goodsList", goodsService.findGoodsVo());

        WebContext webContext = new WebContext(request, response, request.getServletContext(), request.getLocale(), model.asMap());
        html = thymeleafViewResolver.getTemplateEngine().process("goodsList", webContext);
        if (!StringUtils.isEmpty(html)) {
            valueOperations.set("goodsList", html, 60, TimeUnit.SECONDS);
        }
        return html;
    }


    /**
     * 商品详情
     * 未优化版
     *
     * @param model
     * @param user
     * @param goodsId
     * @param request
     * @param response
     * @return
     */
    @RequestMapping(value = "/toDetail/{goodsId}")
    public String toDetail(Model model, User user, @PathVariable Long goodsId,
                           HttpServletRequest request, HttpServletResponse response) {

        GoodsVo goodsVo = goodsService.findGoodsVoByGoodsId(goodsId);
        Date startDate = goodsVo.getStartDate();
        Date endDate = goodsVo.getEndDate();
        Date nowDate = new Date();
        //秒杀状态
        int secKillStatus = 0;
        //秒杀倒计时
        int remainSeconds = 0;
        //秒杀还未开始
        if (nowDate.before(startDate)) {
            remainSeconds = ((int) ((startDate.getTime() - nowDate.getTime()) / 1000));
        } else if (nowDate.after(endDate)) {
            //	秒杀已结束
            secKillStatus = 2;
            remainSeconds = -1;
        } else {
            //秒杀中
            secKillStatus = 1;
            remainSeconds = 0;
        }
        model.addAttribute("remainSeconds", remainSeconds);
        model.addAttribute("secKillStatus", secKillStatus);
        model.addAttribute("user", user);
        model.addAttribute("goods", goodsVo);

        return "goodsDetail";
    }

}